Mandrel for cable-presses



2 Sheets-Sheet 1.

(No Model.)

R. S. WARING.

MANDREL'FOR G'ABLE PRESSES.

Patented Majr. 4, 1884.

Q-HFTYZQ ei l RIEHARDEWARlNG. BY ATTORNEY Y 1( llnesses 13W1J&XDWJ

N. runs. PMIMJMHBMY. Wm F- 2 Sheets Sheet 2.

(No Model.)

B. s. WARING. MAND-REL F-QROAB'L-E PRESSES.

Patented Mar G. W W W p a Y 1 T M 3D JUN-MR m m u @m T x w R A 4 MAM N. PETER; PhoIo-Llllwgrlphor. Walhlnqlon, D.C.

FUNITED STATES PATENT GFrICE.

RICHARD'S. NVARING, OF PITTSBURG, PENNSYLVANIA.

MANDREL FOR CABLE- PRESSES.

I .EPECIFICATION forming part'of Letters Patent No. 294,548, dated March 4, I884.

' Application filed September'QZ, 1883. (No model.)

useful Improvement in Mandrels for Cable- Presses; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of.

this specification, in which-like letters indieating like parts- Figure 1, Sheet 1, is a plan View of my improved mandrel. Figs. 2 and 3 are sectional elevations of the mandrels, the sections being taken on the lines w w and x? m of Fig. 1. Fig. 4 is aside elevation of the mandrel. Figs. 5, 6, and 7 are transverse sectional views, the sections being taken on the lines 3 y, y and 51 y of Fig. 4. Fig. 8, Sheet 2, is a plan view of the die to .be used with my mandrel. Figs. 9 and 10 are sectional views of dies, showing different forms of openings in the die.

In laying telegraph, telephone, and other wires for electrical purposes it is frequently essential that the conductors should be protected from the induced currents from'other wires in'close proximity, and from moisture and other injurious external agencies. It has been found by experiment that the best means by which the conductors can be protected from these and other injurious agencies is to coverand surround them with a thin covering of lead. The most practicable method'of applying this covering is to form a tubeor vpipe around the conductors in a lead-press, the conductors being drawn through core of the press,

and the lead pressed around it as it leaves the core Conductors have been heretofore inclosed in lead pipes, as above stated; but the capacity of the presses has been limited to the formation of a single cable at a time.

The object of my invention is to increase the capacity of the presses now in use, and to provide means whereby the lead is caused to flow more readily around the end of the core,- and around the conductor emerging therefrom;

and my invention consists, in general terms, in-

the construction and combination of my improved core and die, as hereinafter set forth and claimed.

A is a body of steel or other suitable metal,

outer ends, c for the purpose of guiding the metal from around the body of the teats to the conductors emerging from their ends. Thus by cutting away themandrel at a and the teats at a the direction of flow of the metal is gradually changed, and the great pressure required in changing the flow abruptly is obviated. By separating these teats and causing them to project some distance above the body A of the core, the lead can flow completely around these teats, thus furnishing a supply of metal on every side, and insuring an equal pressure all I around the teats and the conductor during the formation of the cable, and obviating all danger-of injuring the insulation of the conductor by a greater pressure on one side than on the other. By cutting away the teats at a short nipples are formed, around which the passage in the lead pipe for the conductors is formed, thereby preserving insulation of the wires from injury by the direct pressure of the lead.

a In connection with the above-described core I use the die B, (shown in Figs. 8, 9, and 10,) in which are formed the openings 1), which may be of any desired form-oval, round, angular, &c.adapted to form the exterior shape to the lead covering. These openings b are enlarged at their upper ends to form basins or receptacles, into which the lead flows before being forced around the nipples, whose ends are adjusted so as to project into these basins. The side walls of these basins may be either vertical, as shown in Fig. 9, or may flare outward from the opening I), as shown in Fig. 10.

. By flaring the side walls, as shown in Fig. 10,

the lead is guided gradually into these basins, and around the nipples therein.

I have shown a core provided with three teats having a single passage therethrough for forming three distinct cables, eachprovided with a single wire; but it is obvious that more than three teats could be used, and that more than one wire could be passed through each teat; but this latter feature forms the subjectmatter of another application of even date herewith.

\Vhat I claim herein is- 1. The core A for a lead-press,having three or more teats, a, with passages therethrough, in combination with a die having an equal number of openings, substantially as set forth.

2. The mandrel A for a lead-press, having three or more teats, of, with apassage through each teat, and having the incline guiding-surface a, substantially as set forth.

3. The mandrel A for a lead-press, having the inclined guiding-surface a, and provided with three or more teats, a, each teat having a Wire-passage, a", and an incline guidingsurface, a, substantially as set forth.

4. The mandrel A for a lead-press, having three or more teats, (4 each teat having a wirepassage therethrough and an inclined guidingsurface, a", in combination with a die, B, having a like number of openings, 1), provided with flaring sides, substantially as set forth.

In testimony whereof I have hereunto set my hand.

RICHARD S. \VARING.

itnesses:

D. S. WoLooT'r, R. H. Wrntr'rLEsnY. 

